JPS62233318A - Concrete sink frame - Google Patents

Abstract

PURPOSE:To obtain a concrete sink frame for preventing the scouring of the mound of a breakwater by charging a heavy material into a box with arranged latticed crosspieces. CONSTITUTION:Striped or latticed crosspieces 3 are arranged in a square or triangular frame 6 to form a concrete bottom slab 1 and also concrete side slabs 5 and 7. A box is made up of these slabs 1, 5, 7. A corrosion-resistant heavy material is charged into the box to form a concrete sink frame 9. The scouring of the mound of a breakwater can thus be prevented, effectively, and the concrete sink frame can be constructed easily because of its simple flat plate form.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a highly productive concrete manufacturing frame used for the base of a seawall for preventing erosion on the coast or river.

[Conventional technology]

Conventionally, concrete breakwaters have been built in areas of the coast that are heavily eroded by waves, but the tip of the base of the breakwater has been eroded by strong breaking waves at low water depths and by overlapping waves at high water depths, and this has gradually caused damage. Accidents that spread and lead to the destruction of breakwaters are occurring frequently. Therefore, the mound for foot protection is built long and strong in front of the breakwater body so as not to damage the breakwater itself. Despite such careful construction, most of the breakwater damage accidents were caused by scour at the base of the tip of the breakwater mound.

On the other hand, a wooden frame filled with stones has been effectively used for flood control in rivers and other areas since ancient times. However, in recent years, concrete blocks have come to be used exclusively because of the complexity of their structure, which requires manpower to manufacture, the lack of wood, and the inability to pass through large structures.

[Problem that the invention seeks to solve]

The inventor attempted to use this method, but there was a shortage of wood for the conventional wooden method, and it was difficult to manufacture a large method that was incomparable to the ones used in ancient times. was impossible. Therefore, there was a need for a concrete frame that could be manufactured easily even if it was large.

c) Means for Solving Problems] and [Operations] The present invention aims to solve the above-mentioned problems, and its structure includes a concrete bottom plate in which crosspieces are arranged in a striped or lattice shape within a rectangular or triangular frame. Concrete weir side plates are placed upright from each side of the side plates to form an integrally connected and fixed box that surrounds the bottom plate, and the side plates have striped or lattice-like crosspieces in the frame. The housing is characterized by having one corrosion-resistant material placed inside the box. That is, the present invention disassembles the legal frame into flat members such as the bottom plate, side plates, columns, etc., casts each member of a simple structure, and then assembles and puts it into water. After filling with heavy corrosion-resistant material, a lid is placed on the container.

The material of the method frame of the present invention is concrete, preferably reinforced concrete. The bottom plate is surrounded by a thick frame, and is preferably rectangular, but in some cases it may be triangular,
There is no problem as long as it is a polygon, even if it is a rhombus. Inside the frame, crosspieces are provided in a striped or lattice pattern, but if greater strength is required, an auxiliary frame is additionally provided.

The side plates have a rectangular shape with one side matching each side of the bottom plate, and are required as many times as the sides of the bottom plate, and the side plates are made to stand upright from each side to form a box. When fixing the side plate to the bottom plate, bolts or the like may be used and the bolt holes may be sealed with watertight cement, adhesive, or the like. To make it even more sturdy, thick columns are fixed upright at the corners of the bottom plate, and side plates are fitted between each column. The side plates are also provided with vertically striped bars, horizontal striped bars, or lattice-shaped bars, etc., and when particularly strong strength is required, appropriately thick auxiliary frames are provided in the vertical or horizontal direction.

The spacing between the crosspieces may be such that heavy objects placed in the bottom plate and side plate co-precipitation frame do not escape and do not impede water permeability.

After forming the box of such a legal frame, it is placed in water, and a corrosion-resistant heavy object is put into the submerged frame. Corrosion-resistant heavy objects need only be heavy and hard, do not deform, are not corroded by water, and have sufficient gaps for water to pass through even after being placed in the framework, such as crushed stone or concrete blocks. preferable. When putting such heavy objects into a sinking frame, if you put a relatively small heavy object at the bottom and a large heavy object at the top, the heavy objects inside will be covered without using a lid. Although there is no risk of it escaping, it is safer if it is covered with a lid consisting of a frame and a rough auxiliary frame.

The above-mentioned legal frames are not necessarily produced individually, but if a plurality of frames are connected in succession, there is an advantage that a plurality of legal frames can be installed at once.

〔Example〕

FIG. 1 is an exploded perspective view of the legal frame 9 of the present invention.

1 is a bottom plate, and 6 is a frame body. Auxiliary frames 2 are provided vertically and horizontally, and crosspieces 3 are arranged in a striped manner in the remaining space.

Numeral 4 denotes pillars, which are planted at right angles to the four corners of the rectangular bottom plate 1. When planting, bolts were tightened and the bolt holes were sealed with cement mortar. 5 is +11111 anti,
Horizontal bars 3a are arranged, and an auxiliary frame 2a is provided in the center. The side plates 5.5' have the same shape, and the narrower column spacing 4a, 4
It was inserted between b and 4C14d. Also, the other side plate 7
．． 7' also has a similar shape with horizontal bars 3b arranged, and a vertical auxiliary frame 2b is provided and fitted between the longer pillar intervals 4a, 4d and 4b, 4C.In fitting these side plates, Various fastening means such as bolts, U-clips, rivets, and adhesives were used singly or in combination.

The box thus produced was placed in a predetermined location underwater, and the inside was filled with crushed stone. 8 is the lid body, and the auxiliary frame 2
C were provided vertically and horizontally, and fitted into the upper part of the legal frame after the heavy object was filled.

FIG. 2 shows an example of the use of the method frame of the present invention, and is an explanatory cross-sectional view of a breakwater constructed on the Sea of Japan side with a water depth of 15 m or more. In the drawing, the part indicated by the broken line is a quarter point of the maximum wavelength. The maximum wavelength is the average value of the maximum wavelength and wave height statistically obtained by continuously measuring the wavelength and wave height at each port. This is the basis for strength calculations. According to conventional experiments and experience, it has been found that in high water depth areas, especially in mounds with a depth of 15 m or more, the 1/4 area of the maximum wavelength is the area where the most severe scour occurs.

11 is a breakwater, 12 is a water surface, and 13 is crushed stone.

A large heavy block 14 was laid in front of the base of the breakwater. In this embodiment, a concrete block having a horizontal protrusion on the upper surface was used, but any heavy concrete block such as a rectangular one or one having an upward protrusion may be used. 15 is a star-shaped block, which is used in combination with side pieces extending alternately from both sides. Reference numeral 16 denotes a hole for releasing water pressure, which was provided in the center of the main body, and the diameter of the hole was larger on the bottom surface than on the top surface, in order to discharge the pressure water that had entered into the crushed stone 13. The drawing shows a cross section of the center of the hole. 17
is a shoe provided on the lower surface of the side piece, which stabilizes the star-shaped block 15 embedded in the crushed stone 14. Although the star-shaped block 15 has a slope of 1:2, it is also possible to make the slope even steeper to about 1:1.5. Reference numeral 18 denotes a root block for preventing the star-shaped block 15 from slipping down. The frame 9 according to the present invention was buried adjacent to this root stop block 18. In this example, the legal frame 9 is a rectangular type with horizontal bars on the bottom and sides, and the inside is filled with crushed stone. Crushed stone was further laid in front of the legal frame 9, and the area in front of the 1/4 point of the maximum wavelength remained on the same ground. That is, in FIG. 2, the part shown by the two-dot chain line is the initial ground, and the part shown by the solid line is the ground one year later.

In this example, scouring first started from the 1/4 point (dashed line in FIG. 2), and then the area between the 1/4 point and the slope 9 was deeply scoured. However, in the case of the present example, further ahead of the 1/4 point, the crushed stones scattered by the scour and the returning waves were integrated with the ground, forming an integrated ground 10. Therefore, due to this integrated ground 10, the returning waves also lost their scour power, and equilibrium was reached with the topography as shown by the solid line in FIG. 2. On the other hand, the mound was constructed in the same manner as in the previous example, except that no slope frame was used, any covered area was sloped more gently than 1:3, and the area up to 1/4 of the maximum wavelength was covered with various concrete blocks. , the area where the unified ground was formed was subject to endless erosion, crushed stone was scoured, concrete blocks were scattered, and constant repairs were required.

〔effect〕

According to the present invention, the large concrete legal framework, which can effectively prevent scouring of the breakwater mound, is broken down into a simple plate-like shape that can be cast using simple formwork, making it easy to carry out even large-scale construction work. Can be constructed and constructed.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is an exploded perspective view of a legal frame, and FIG. 2 is a cross-sectional explanatory view of a mound of a breakwater using the legal frame. In the drawing, 1 is the bottom plate, 2 is the auxiliary frame, 3 is the crosspiece, 4 is the pillar, 5.7 is the side plate, 6 is the frame body, 8 is the lid body, 9 is the legal frame, 10 is the integrated ground, 11 1 is a breakwater, 2 is a water surface, 13 is crushed stone, 14 is a heavy block, 15 is a star-shaped block, 16 is a hole, 17 is a shoe, and 18 is a root block.

Claims (1)

[Claims] A concrete bottom plate with crosspieces arranged in a striped or lattice pattern is cast inside a rectangular or triangular frame, and concrete side plates are stood upright from each side of the side plate to form an integral structure that surrounds the bottom plate. A concrete manufacturing frame formed by forming a connected and fixed box, in which the side plates have crosspieces arranged in a striped or lattice pattern, and a heavy corrosion-resistant material is placed in the box.